Telephone crossbar switch, Swedish Ericsson, 1921

Made:
1921 in Stockholm
Telephone crossbar switch, Swedish Ericsson, 1921. Telephone crossbar switch, Swedish Ericsson, 1921. Telephone crossbar switch, Swedish Ericsson, 1921. Telephone crossbar switch, Swedish Ericsson, 1921.

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Buy this image as a print 

Buy

License this image for commercial use at Science and Society Picture Library

License

Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Telephone crossbar switch, Swedish Ericsson, 1921.
Science Museum Group Collection
© The Board of Trustees of the Science Museum

Telephone crossbar switch, made by Swedish Ericsson, Stockholm, Sweden, 1921.

Crossbar switching dates back to the earliest days of manual telephone switchboards, which used sets of overlapping brass bars with holes at the intersections for brass plugs to connect telephone calls. This switch had ten horizontal and ten vertical bars, so could support up to 100 subscribers. Crossbar switches needed less maintenance than step-by-step switches exchanges, and operated more simply.

Details

Category:
Telecommunications
Object Number:
1970-454
type:
electric switch
taxonomy:
  • component - object
credit:
Donated by L. M. Ericsson